Clear Outside v1.0 - International Weather Forecasts For Astronomers

Tuesday 16

Waning Crescent 12%

06:02

13:05

06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 OK
21 OK
22 OK
23 OK
00 OK
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 08:08, Set: 15:43, Transit: 11:56. Moon - Rise: 06:02, Set: 13:05. Civil Dark: 16:25 - 07:26. Nautical Dark: 17:10 - 06:41. Astro Dark: 17:52 - 05:59

Total Clouds (% Sky Obscured)

100
100
100
100
98
96
100
100
99
87
81
99
100
47
35
26
29
26
33
81
52
86
89
90

Low Clouds (% Sky Obscured)

92
100
97
88
87
80
79
54
41
33
5
7
18
30
28
26
29
26
33
38
37
35
39
39

Medium Clouds (% Sky Obscured)

99
100
100
100
98
96
100
100
99
87
81
99
100
47
35
3
3
0
0
0
0
0
32
31

High Clouds (% Sky Obscured)

84
100
91
100
75
52
78
70
50
51
5
3
4
47
4
0
3
3
11
30
41
76
64
73

ISS Passover

Visibility (miles)

9
4
3
3
3
6
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
55
100
100

Precipitation Type

Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

95
95
95
95
95
83
76
52
15
6
3
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0.4
1.3
1.6
0.9
0.9
0.4
0.4
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

6
5
5
8
11
9
8
8
7
6
5
5
5
6
6
6
6
6
5
5
5
5
6
7

Chance of Frost

Temperature (°C)

9
9
9
9
9
8
8
8
8
8
7
7
7
6
6
5
4
4
4
3
3
3
3
3

Feels Like (°C)

7
7
7
7
5
6
6
6
6
6
6
5
5
4
3
2
3
3
3
2
2
1
0
-1

Dew Point (°C)

9
9
9
8
8
7
7
7
7
6
6
5
5
5
4
3
3
2
2
2
1
1
1
1

Relative Humidity (%)

96
98
98
98
95
93
91
91
91
90
90
90
91
94
91
85
88
86
88
89
88
88
88
88

Pressure (mb)

1005
1005
1006
1007
1008
1009
1009
1010
1010
1011
1012
1012
1013
1014
1014
1014
1015
1015
1015
1015
1016
1016
1016
1015

Ozone (du)

288
289
289
292
294
300
304
311
325
331
336
342
345
356
353
339
330
326
320
313
314
312
310
302

Wednesday 17

Waning Crescent 7%

06:02

13:24

06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 08:09, Set: 15:44, Transit: 11:56. Moon - Rise: 06:02, Set: 13:24. Civil Dark: 16:26 - 07:26. Nautical Dark: 17:11 - 06:42. Astro Dark: 17:53 - N/A

Total Clouds (% Sky Obscured)

90
100
100
98
100
100
100
100
100
97
100
100
100
100
100
100
100
100
100
100
100
100
100
100

Low Clouds (% Sky Obscured)

34
29
0
0
95
80
100
100
86
93
100
100
100
100
100
100
100
100
80
87
69
60
62
62

Medium Clouds (% Sky Obscured)

46
36
81
98
71
90
100
70
63
78
39
38
84
93
100
85
96
100
100
100
100
100
100
100

High Clouds (% Sky Obscured)

76
100
100
92
100
100
100
100
100
35
33
34
100
100
100
57
100
100
100
100
100
100
100
100

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
4
9
3
9
9
9

Fog (%)

100
100
100
99
26
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
Light Rain
Very Light Rain
None
None
None
None
None
None
None
None
Very Light Rain
None
Light Rain
Light Rain
Light Rain
Very Light Rain
None
None
None

Precipitation Probability (%)

0
0
0
1
42
67
53
25
7
17
14
6
7
13
41
65
50
95
95
95
77
54
24
1

Precipitation Amount (mm)

0
0
0
0
0
0.4
0.2
0
0
0
0
0
0
0
0
0.3
0
0.9
0.9
1.6
0.3
0
0
0

Wind Speed/Direction (mph)

8
9
10
12
13
14
15
16
17
17
18
19
19
20
21
21
21
21
21
21
19
17
16
15

Chance of Frost

Temperature (°C)

2
3
3
4
4
5
6
7
7
7
8
8
8
8
8
9
9
9
9
9
10
10
10
10

Feels Like (°C)

-1
-1
-2
-1
-1
-1
0
1
2
2
2
2
3
3
2
3
3
3
3
3
4
4
4
5

Dew Point (°C)

0
1
1
1
1
1
2
3
4
4
5
5
5
5
5
6
6
7
8
8
8
8
8
8

Relative Humidity (%)

86
86
85
82
77
76
75
76
78
79
81
82
81
81
79
82
82
85
88
88
91
88
90
90

Pressure (mb)

1016
1015
1016
1015
1015
1015
1014
1013
1012
1011
1011
1010
1010
1009
1008
1008
1008
1007
1007
1006
1007
1007
1006
1007

Ozone (du)

299
297
295
293
292
292
295
293
291
292
292
290
290
292
294
294
297
301
305
306
306
307
305
302

Thursday 18

Waning Crescent 3%

07:15

13:52

06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 08:09, Set: 15:44, Transit: 11:57. Moon - Rise: 07:15, Set: 13:52. Civil Dark: 16:26 - 07:27. Nautical Dark: 17:11 - 06:42. Astro Dark: 17:53 - 06:00

Total Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
99
100
99
99
99
100
100
99
100
100
97
75
76
83
80
78

Low Clouds (% Sky Obscured)

61
68
93
94
93
97
93
91
93
94
76
71
81
66
53
71
76
55
34
12
0
0
0
0

Medium Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
98
100
99
99
98
100
100
93
93
89
87
34
33
37
35
39

High Clouds (% Sky Obscured)

100
100
100
100
100
100
100
100
69
60
61
70
85
82
100
96
100
100
96
43
41
28
17
2

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
2
8
5
3
3
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
Light Rain
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

5
12
29
83
95
95
95
95
95
95
95
62
8
0
7
32
22
3
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0.5
1
0.8
0.8
1.1
1
0.9
0.9
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

12
11
11
13
14
16
17
19
21
22
23
20
16
17
18
18
16
17
15
14
13
13
12
12

Chance of Frost

Temperature (°C)

10
10
10
10
10
10
10
10
10
11
11
11
11
11
11
11
11
10
9
8
7
6
6
6

Feels Like (°C)

6
6
6
6
6
5
5
4
4
4
4
6
6
5
5
5
6
5
4
3
4
2
2
2

Dew Point (°C)

9
9
9
9
9
9
9
9
9
9
10
10
8
8
8
8
8
6
6
6
4
3
3
3

Relative Humidity (%)

91
91
93
93
91
90
93
90
91
90
91
92
81
84
84
84
81
77
81
84
82
79
79
80

Pressure (mb)

1007
1007
1007
1006
1005
1004
1002
1001
999
999
998
999
1000
1001
1001
1002
1003
1004
1005
1006
1008
1009
1009
1010

Ozone (du)

299
297
294
292
293
293
291
293
299
296
299
306
315
325
345
363
373
375
374
371
365
360
358
355

Friday 19

Waning Crescent 1%

08:20

14:32

06 Bad
07 Bad
08 OK
09 OK
10 OK
11 OK
12 OK
13 OK
14 OK
15 OK
16 OK
17 OK
18 OK
19 OK
20 OK
21 OK
22 Bad
23 Bad
00 Bad
01 Bad
02 OK
03 OK
04 OK
05 Bad

Sun - Rise: 08:10, Set: 15:44, Transit: 11:57. Moon - Rise: 08:20, Set: 14:32. Civil Dark: 16:26 - 07:28. Nautical Dark: 17:11 - 06:43. Astro Dark: 17:54 - 06:01

Total Clouds (% Sky Obscured)

62
45
23
19
17
23
23
22
24
24
20
20
18
20
24
23
60
70
58
43
28
30
33
35

Low Clouds (% Sky Obscured)

10
20
23
19
17
23
23
22
24
24
20
20
18
20
24
23
37
38
39
39
28
30
33
35

Medium Clouds (% Sky Obscured)

26
13
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

High Clouds (% Sky Obscured)

1
1
0
0
0
0
0
0
0
0
0
0
0
0
2
2
30
45
29
17
2
2
1
2

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

13
13
13
13
13
13
14
14
13
12
12
11
11
11
11
11
10
10
9
10
10
10
10
10

Chance of Frost

Temperature (°C)

6
6
6
6
7
7
8
8
8
8
7
7
6
6
6
5
5
5
5
4
4
4
4
4

Feels Like (°C)

2
2
2
2
3
4
5
5
5
5
4
4
2
3
2
2
2
1
0
0
1
1
1
1

Dew Point (°C)

3
3
3
3
4
4
5
5
5
5
5
5
4
4
4
4
4
4
4
3
3
3
3
3

Relative Humidity (%)

82
82
83
83
84
81
78
78
79
82
85
87
88
88
90
91
91
93
93
93
91
91
91
93

Pressure (mb)

1010
1011
1012
1013
1013
1014
1014
1014
1014
1015
1015
1015
1015
1016
1016
1016
1015
1015
1015
1014
1014
1014
1013
1013

Ozone (du)

367
363
356
356
357
363
361
352
333
331
323
310
304
304
303
302
296
292
288
284
280
276
273
271

Saturday 20

New Moon 0%

09:14

15:26

06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 OK
19 OK
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 08:10, Set: 15:45, Transit: 11:58. Moon - Rise: 09:14, Set: 15:26. Civil Dark: 16:27 - 07:28. Nautical Dark: 17:12 - 06:43. Astro Dark: 17:54 - 06:01

Total Clouds (% Sky Obscured)

37
61
63
69
57
60
65
69
65
60
67
72
16
28
39
36
43
49
49
51
52
56
68
80

Low Clouds (% Sky Obscured)

37
51
47
63
57
60
65
69
65
60
67
72
0
0
0
9
19
28
31
33
31
32
32
31

Medium Clouds (% Sky Obscured)

0
0
0
7
14
21
29
43
50
55
60
60
10
21
31
33
34
36
28
21
16
18
18
15

High Clouds (% Sky Obscured)

2
35
39
6
9
10
27
51
65
47
26
1
16
28
39
36
43
48
47
43
31
30
28
30

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
0
0
0
0
0
11
23
33
39
46
54
2
2
1
7
10
5
4
2
0
0
0
0

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

11
11
12
12
14
15
17
16
14
14
13
14
14
11
11
11
10
10
10
10
10
10
9
9

Chance of Frost

Temperature (°C)

4
4
4
5
6
7
8
8
8
8
7
7
7
5
4
4
4
4
4
4
4
4
3
4

Feels Like (°C)

1
1
0
1
2
3
4
5
5
5
4
4
3
2
1
1
1
0
0
-1
-0
0
0
0

Dew Point (°C)

3
3
3
4
4
5
5
5
5
5
5
5
5
3
3
2
2
3
3
2
2
3
2
3

Relative Humidity (%)

93
93
93
94
91
88
84
81
82
85
88
88
88
89
89
88
89
91
91
91
91
93
91
93

Pressure (mb)

1012
1012
1011
1011
1010
1010
1009
1008
1007
1006
1006
1006
1005
1006
1006
1006
1006
1006
1005
1005
1005
1005
1005
1005

Ozone (du)

271
275
280
284
289
292
297
302
305
305
304
305
306
309
313
316
317
319
320
316
312
307
309
310

Sunday 21

Waxing Crescent 2%

09:54

16:34

06 Bad
07 Bad
08 Bad
09 Bad
10 Bad
11 Bad
12 Bad
13 Bad
14 Bad
15 Bad
16 Bad
17 Bad
18 Bad
19 Bad
20 Bad
21 Bad
22 Bad
23 Bad
00 Bad
01 Bad
02 Bad
03 Bad
04 Bad
05 Bad

Sun - Rise: 08:11, Set: 15:45, Transit: 11:58. Moon - Rise: 09:54, Set: 16:34. Civil Dark: 16:27 - 07:29. Nautical Dark: 17:12 - 06:44. Astro Dark: 17:54 - 06:02

Total Clouds (% Sky Obscured)

86
92
96
94
95
93
87
91
93
92
94
99
100
100
100
97
92
85
82
77
74
68
66
65

Low Clouds (% Sky Obscured)

43
51
62
53
48
43
46
51
74
83
88
89
88
72
61
62
61
62
60
55
53
53
52
52

Medium Clouds (% Sky Obscured)

14
15
17
14
10
5
3
2
0
20
38
57
71
86
100
88
76
60
55
53
50
62
66
65

High Clouds (% Sky Obscured)

25
30
35
40
45
45
45
45
45
45
40
40
40
35
30
30
35
35
25
25
25
25
30
25

ISS Passover

Visibility (miles)

9
9
9
9
9
9
9
9
9
9
9
9
9
7
6
4
6
7
9
9
9
9
9
9

Fog (%)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Precipitation Type

None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None

Precipitation Probability (%)

0
1
2
4
4
3
8
9
7
24
32
37
48
55
60
56
51
44
37
28
6
14
14
9

Precipitation Amount (mm)

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Wind Speed/Direction (mph)

9
8
8
7
7
8
9
8
8
8
8
7
8
8
8
9
9
9
9
9
8
7
7
7

Chance of Frost

Temperature (°C)

4
4
3
3
4
5
6
6
6
6
6
6
5
6
6
6
6
6
6
6
6
6
5
5

Feels Like (°C)

-0
-1
-1
-1
-0
0
0
3
2
2
2
2
2
2
2
1
1
1
0
2
2
2
2
2

Dew Point (°C)

2
3
3
3
3
4
5
4
5
5
5
5
5
5
5
6
6
6
5
5
5
5
4
4

Relative Humidity (%)

91
93
94
94
94
93
91
90
91
91
93
96
96
96
96
98
96
96
96
94
94
93
93
96

Pressure (mb)

1004
1005
1005
1005
1005
1005
1005
1005
1005
1005
1006
1006
1006
1006
1006
1007
1007
1007
1007
1008
1008
1008
1008
1009

Ozone (du)

312
318
323
329
332
335
338
339
340
341
343
345
347
347
348
348
350
352
353
354
354
354
354
353

Monday 22

Waxing Crescent 6%

10:22

17:51

Sun - Rise: 08:11, Set: 15:46, Transit: 11:59. Moon - Rise: 10:22, Set: 17:51. Civil Dark: 16:28 - 07:29. Nautical Dark: 17:13 - 06:44. Astro Dark: 17:55 - 06:02

Total Clouds (% Sky Obscured)

Low Clouds (% Sky Obscured)

Medium Clouds (% Sky Obscured)

High Clouds (% Sky Obscured)

ISS Passover

Visibility (miles)

Fog (%)

Precipitation Type

Precipitation Probability (%)

Precipitation Amount (mm)

Wind Speed/Direction (mph)

Chance of Frost

Temperature (°C)

Feels Like (°C)

Dew Point (°C)

Relative Humidity (%)

Pressure (mb)

Ozone (du)

Forecast for Boston, Lincolnshire, United Kingdom (52.98,-0.02)

Generated: 16/12/25 06:38:03. Forecast: 16/12/25 to 22/12/25. Timezone: UTC+0.00